Sawing machine using a portable electric saw on a trackway engaging the work



Jan. 7, 1958 1 E cr; 2,818,892

SAWING MACHINE UING A PORTABLE ELECTRIC SAW ON A TRACKWAY ENGAGING THEWORK 4 Sheets-Sheet 1 Filed June 16. 1955 Fig. 3 I

INVENTOR IRA E. PRICE ATTORNEY Jan. 7, 1958 1 E PR E 2,818,892

lC SAWING MACHINE USING. A PORTABLE ELECTRIC SAW ON A TRACKWAY ENGAGINGTHE WORK Filed June 16. 1955 4 Sheets-Sheet 2 7 INVENTOR 'IRA E. PRICEATTORNEY Jan. 7, 1958 8 2,818,892

l. E. PRICE SAWING MACHINE USING A PORTABLE ELECTRIC SAW ON A TRACKWAYENGAGING THE WORK Filed June 16. 1955 4 Sheets-Sheet 3 IINVENTOR IRA E.PRICE BY I ATTORNEY Filed June 16. 1955 Jan. 7, 1958 2,818,892

l. E. PRICE SAWING MACHINE USING A PORTABLE ELECTRIC SAW ON A TRACKWAYENGAGING THE WORK 4 Sheets-Sheet 4 INVENTOR v IRA E. PRICE BY ATTORNEYUnited States Patent O SAWG MACHINE" USING A PORTABLE EIZEC-",Ihisfinvention relates to improvements"in"portable sawing machines inwhich portable motordriven circular saws are-used, and includes meansfor sounounting" the power driven .saw .unit with relation toworki'holding m'ea'nsfthat atwi'de variety of.'transverse,'longitudinaland miter cutsmay be cuti'in the work'with'great precision,a'ccuracmjspeed, :andefficiency while assuring maximum safety.

Afurther' object is to so-constmctsuch saw mounting and workholdingmeans asto becomparablein efiiciency andaccuracyto largermechanically controlled powered circular saw devices.

A'further object is to so construct such agdevice'that itmay'be'cheaplymanufactured, simple to operate, and durable in use, and may beeasilycarried by the user.

A still further object is to so design the work holdingandjadjustablesaw carryingmeans that it maybe used a"b'enchsaw and maybe operated either horizontally or vertically 'and'in'thelatter use itmay'effect pronounced saving 'in floor space, -while being used"etficiently -forcutting large area boards or sheets.

More-specific objects are so relating the work engaging and clampingmeans to the adjustable power saw mounting' means that-they may be'rigidand secure while-pertforr'ning sawing,=-gr'oovi ng, ra'bbeting, andother shaped cuts.

Other objects of myinvention will become-apparent in -thefollowingspecification which relates to the accompanyingkdrawings- 'inwhich Ihave illustrated a preferred embodiment-of the present invention; and inwhich:

-Figi -lis a side-elevation ofthe"machineincluding-the? portable power=saw= mounted 'thereOn;

i igl- 2 isaplan view of the machine;

g. 3' is a fragmentary-view in *elevation 'showing the Work "holdingcarrier and 'angle indicating scale;

iliig. '4 is afragme'ntary view'of a portion ofthe motor and sawcarryingframe and-securing="means;

fiEigu-S'Eis a fragmentary sectional view inthenatureof aside'elevationofwthesame;

-Fig::6 is a'transverse' sectiontakenon aplan'eindi'cated' bytfthelinea6-6' of' Figz 5; l n

:Fig. 7.: is a3 detail perspe'ctive 'of a-clamping or locking member;

-Eig 8 is aifragmentary-perspective viewtof rthe"intermediate portion ofthe motor and saw carrying frame and clamping mean-s;

=Eig: 9,:is a perspective view of the work carrier 'table and-clampingmeansyand I Fig-. 10 is apersp'ectiveview of amodifiedform of ithe saw-carrier-and-work clamping means adapted: for mounting in anuprightcposition.

,A :base frame comprises parallel tanglebars 1" suitably connected bycross membersgone of which iS indicatedE at Zain-Fig. 9; Above the frame:1 1 areparallel-rbed rails 3' of aswinging frame, freely movable underaswork carrying table 5, here shown'as having :its'forward edgei'oicurved about a pivot -7.(Fig.' 2)- which-:connects the work clampingrandmotor-mounting means withz-theabed frame,

it against thee positioning back: up!irail"101iand'apresses itdownwardly onto the table 5. This firm clampingn-an'd as will bepresently described. The table 5 is supported;

upon the frame 1 by spacers 4 (Figs. 1 and 2).

An arcuate strap 8 con-forms in height to the rails 1 and ,is shown assemi-circular, and 'aiio'rds a supporting stabilizing member beneath theswinging rails 3.

'Assuminglthata work piece W (F-lg. 1) is to be clamped on'the table 5,it is broughtagainst a transverse 'strap' lO. rigidly securedtothe table5. and presenting a guideshoul-v der'to one edge of]. the board or work.piece W.

Attheendsiof'the rails 3 of. the lower swinging frames are pivotedparallel; supporting links 12 and l4,.whic h,.

in ,turn, are connected to Workclamping and guiding rails 15 and 16,shown as. comprising. angle members and round'rods" '17. "The anglemembers in turn. are pivot'ed as shown at 18 'andrl9to the pairs of endlinks 12 and 14. Forrigidity' these end;links are rigidly connected bycross members; su'chas indicated at 20 and 21, positioned intermediatelyof the cross braces 23 and 24 which are rigidly connected to the ends.ofthe bars. 3, and 15 and 16,-

respectively.

I'havethus, provided ,arigid rectangularufrarne comprising-theparallekmem'bers 3 and 23. ,This swinging fram-restsmponthe baseiframecomprising essentially the-members 1- and 2; while above the table 5the'sirnilar rigidframeycomprisingthe parallel rails 15 and '16 andend'membersQ l-and 25,1 is movable on'the parallelliinks 12 and14,"whereby-the upper frame maymoveupwardly to-perniit'in-sertion o fthe work thereunder and? onto' the,

tableand then be 'cla nped'by this upper frame; the, clamping actionbeing permitted by the swinging of the links 12 and i14downwardly tobring the rails firmly into contact with the workpiece.

' These upper and'lower connected frames are thus niaintained inparallelism after the fashion-of'lparallelrulers; Thus;asthey'yarvmoved' upwardly and-downwardly,

swinging about the pivot links 1-2'and 1-4;;connecting*them attheirends; obviouslyparallel-relationshipbeingmaimtained;aiclampingpressure may-'be lapplied uniformly by the bottoms of=the railmembers 15'ia1'1d 16 to' the upper surface 'ofitheiwork pieceW; such,as-ab'oard. This cIa-mp--" ingniaction". firmly: holds flhezworkiniclampe'd position g-rippingiactiomis'importaint in-assuring accuracyofiwork anduimfurthenassuring:esafety in:efiecting' the' cut byithemotor :driven: saw on 1001.

The portable saw and motor unit S is mountedion: a-i

platerpfiz andit is desirable a towprovide an: intermediatedirebtionshown in Figs. 1 ,and 2.

' The ,saw supporting sub-frame is thereforerspefiially designed toclamp the motor and saw;supporting.plrteBZ" in.eith er of its twopositions; namely, with the saw, parallel. tofthe longitudinal rails 15,and 16,. ortransversely,

thereof."

'Theim'otor supporting plate 32 is shown as' having parallel endsand-sides and considerably narrower ini width} than'its" length.

The saw-carryingsub=frameis shown as compr sing. cross members 34 and35- having transverse openings at i the-=bottom sides' thereof, slidablyembracing the rods"17, and -these-cross -members 34 and-35 are held-'inspac'ed" relationby inner= round rod-like rail members 36=and37"extendingszthrough.openings=in the cross bars 34 and '35,

and-radjustablytz-rigidly clamped thereto, as by set screw-S r indicatedat 38.-:-and r39.

Fixed on the bar 35 is an angle supporting strip having a horizontalshelf-like portion 40 and a portion 41 lying against and secured to thebar 35. An angle strip 43 is rigidly secured to the vertical portion 41and projects inwardly of the frame as shown in Figs. 4 and 5.

A similar supporting shelf 45 is formed of an angle bar and projectshorizontally from the lower portion of the cross bar 34, and which mayin turn be shaped to extend upwardly and over the same as indicated at46 in Fig. 8.

Normally the ends of the flat metal plate 32 (Fig. 2), forming the basefor the saw unit, rest upon the shelflike flanges 40 and 45, andadjacent the bar 34 it projects under outwardly sloped acute angleflange members 48 (Fig. while at its end adjacent the bar 35, it restsupon.

the shelf flange 40. Here, cone pointed set screws 50 engage the upperedge of the plate, here indicated by the lower broken line 32a in Fig.5. Thus, the motor support may be held by two of these cone pointedclamping screws, permitting the plate to stand at the position shown inFig. 1, or to be moved over and similarly clamped at the opposite sideof the carrier frame or be intermediately positioned.

To mount the saw in the crosswise rip-saw position, the carrier plate 32is turned laterally, and a cross channel bar having a fiat shelf-likeflange 52 may bridge across and slide upon the lower flanges of theangle rails 15 and 16 intermediately of the end bars 34 and 35 of themotor support frame. When in this upper position the plate 32 rests uponthe rods 36 and 37, and the opposed acute angle flange 43 at the shelf40, and a similar angle flange 53 of the cross member 52, may engage themotor plate here indicated in parallel dot and dash lines 32a in Fig. 5.

A jack screw rod may be inserted in the cross bar 34, as shown at 55,and project through an upright portion of the member 52, and threads onthe inner end of this jack screw provide for clamping the bar onto themotor plate 32 by a wing nut 58.

It is desirable to firmly clamp the motor carrier frame to thelongitudinal frame rods 17 which are rigidly mounted within the frameangle members 15 and 16, and for this purpose I provide a saddle-likeclamp 60, shown in Fig. 7, which may embrace the ends of the bar 34,while a screw 61 (Fig. 6) may receive a wing nut 62 for urging itdownwardly, thus pressing notch portions 64 into tight engagement withthe rod 17 at either side of the bar 34.

At the end of the bar 35, I may secure a pointer indicated at 65 (Fig.5) which extends over the graduations on the scale 35, for convenientmeasuring of rip-saw spacing.

The composite saw and motor unit S (Figs. 1 and 2) may comprise a motorM and saw guard G with the usual handle H projecting above the same, andwith provision, not shown, for securely clamping it to the mountingplate 32, while the saw S projects a desired distance below the uppercarrier frame to bring its circumference into approximate alignment ofthe top plane of the table 5. Inasmuch as different forms and sizes ofsaws may be used, the convenience of having the top frame swing upwardlyand then downwardly to clamp upon different thicknesses of work materialwill be apparent.

For ripping operations it may be assumed that the board is manuallymoved longitudinally over the table 5, parallel to the guide rail 10,and for this purpose it is desirable to hold the upper frame and sawunit at different heights. Accordingly, I provide a track lock braceindicated at 70 (Figs. 1 and 9) which is shown as having a hook portionadapted to engage a pin 72 on the link frame 14 and be securedby a wingnut 74 pivoted to the lower rail 3. Additional spaced holes 73 in thelink 70 may be fitted over the pin 72 by releasing the wing nut andagain clamping it after passing the selected' hole over the pin 72.Thus, the top frame is braced and securely held in the positionpermitting the work board, or the like,

to be slid freely under the top frame with the saw in its transverse andselected position for the desired width.

For cross-cutting and mitering, the saw would normally be in theposition shown in Figs. 1 and 2. The clamp 60 would be released,permitting the motor sub-frame to slide freely along the rods 17. Foraccurate cross-cutting as well as for accurate angle mitering, I haveprovided an arcuate scale 80, secured at its ends to the outer cornersof the base frame members 1, and preferably of a height such that itforms additional support for the rails 3, and thus for the table 5, asdoes the arcuate support band 8.

A pointer indicated at (Fig. 2) is secured on a cross member 91 fixed tothe rails 3, while a clamp including a wing nut 93, which may bepositioned as shown in Fig. 1 where room permits, may hold the frame inany angular position, either way from the position shown in solid linesto one such as indicated in dotted lines in Fig. 2.

The saw may also be mounted to turn on an axis presenting the plane ofthe saw at an angle to the support table and clamping frames. Thisprovides for cutting a compound bevel, when desired.

Referring to the modified form of Fig'. 10, the arrangement there shownis particularly useful and effective in sawing large panels such asplywood sheets. It is intended to stand vertically, for example, againsta wall, thus saving floor space while permitting speedy and accuratecutting of such hard to handle large work pieces.

As shown, a rigid frame comprises parallel bars corresponding to thebase members 1 of the form previously described. These upright bars orbase rails may be connected by cross members 101 and 102 to forma rigidframe. This frame may be secured to a vertical wall or to any suitablesupport. On these members are the parallel work-gripping members 103 andrails and 116 which correspond to the bars 15 and 16 of Figs. 1, 2

and 9, and which support the saw carrier sliding frame,

designated generally F, supporting the motor driven assembly, designatedgenerally S, as before. These workgripping members and rails areconnected by parallel pivoted links as at 114, corresponding to thelinks of the horizontal form described. As indicated in Fig. 10, themotor and saw or cutting tool unit is mounted on a circular plate 132which may be clamped in different angular positions.

Extending each way from the frame 100 and in alignment with the spacebetween the parallel clamping members on the frame are guideway supportsshown as constructed to form a guide channel C with rollers, such asindicated at R, and shown as having downwardly extending legs L withadjusting screws for perfecting mutual alignment, as indicated at 140.The motor carrying frame F may be raised or lowered by any suitablemeans.

I have shown pulley arrangements indicated at P with cords such as bywhich the motor frame may be raised or lowered, preferably by the aid ofcounter weight for vertical movement sawing. Likewise, it may be po-.

sitioned and suitably clamped, as before described, at different heightsfor horizontal sawing of large panels. The

From the foregoing description it will be seen that I have providedessentially a two-part frame with an interconnecting parallel linkagemeans for clamping the work piece. I have also provided for accurateangle cutting or mitering while maintaining rigidity and certaintyduring the cutting and handling of the work piece.

Further, it will be seen that I have provided a convenient, simple meansfor clamping the motor and saw support in either cross-cutting orrip-sawing position, with simple, effective means for securely holdingthe motor and saw unit in either of its positions.

The device is safe, and saw guards or tool guards are fixed with theremovable power driven tool units-which supporting chanmay beinterchangeably mounted as described. The work or material being cut isfirmly gripped and may be quickly released. These features contribute toaccuracy, safety, and rapid cutting.

The large arcuate angle measuring scale is readily visible andfacilitates easy setting for the desired angle of cut, and the machineas a whole is useful in the cutting of components and parts ofstructures made of sawable or workable materials used in framing andfinishing of buildings, cabinets, furniture, etc.

It will be seen that in the modified form I have provided for spacesaving while effectively working both longitudinal and cross-sawing oflarge, hard to handle sheets, such as plywood.

Having thus described my invention, what I claim is:

1. In a sawing machine, the combination of a base frame, a table memberthereon having a work supporting surface, a work clamping upper framemember above and parallel to the work supporting surface and base frameand means connecting the upper frame to the base frame includingparallel pivoted link members at the ends thereof, a saw-carryingsub-frame for supporting a power driven saw unit, said sub-frame beingslidably mounted upon the upper clamping frame, said upper frame servingto clamp and hold the work piece to the supporting surface while themotor and saw-carrying sub-frame is moved along the upper frame.

2. The sawing machine defined in claim 1 in which the saw-carryingsub-frame is arranged to engage and clamp the sides of a rectangularbase on a power driven saw unit, and in which two separated clampingstrip members are mounted on the sub-frame and adjustable with rela- 6tion to each other and each having a surface sloping toward the other atan acute angle, and means are provided for holding the clamping stripmembers in engagement with the saw frame base with the plane of the sawunit positioned transversely with relation to the upper clamping framemember.

3. The structure defined in claim 1 in which the work piece clampingframe is also pivoted to the base frame to swing in a plane parallel tosaid base frame, an arcuate graduated scale is mounted rigid with thebase frame, and a coacting indicator is carried by the pivoted frame fordetermining angle of cut.

4. The combination described in claim 1 in which the upper clampingframe and the base frame constitute parallel work clamping frames, andmeans is provided for locking the parallel work clamping frames inrelative adjusted positions.

References Cited in the file of this patent UNITED STATES PATENTS1,584,086 Fonda May 11, 1926 1,832,283 Earhart Nov. 17, 1931 2,347,359Miller Apr. 25, 1944 2,396,961 Meredith Mar. 19, 1946 2,559,283 DickJuly 3, 1951 2,589,554 Killian Mar. 18, 1952 2,595,322 Avery May 6, 19522,633,162 Neuenschwander Mar. 31, 1953 2,677,399 Getsinger May 4, 19542,708,463 Coleman May 17, 1955 2,739,624 Haddock Mar. 27, 1956 2,741,277Legar Apr. 10, 1956

